Dual-polarization radar processing system using time domain method

a processing system and time domain technology, applied in the field of meteorological radar systems, can solve the problems of spectral moment estimates, spectral filtering techniques are the effects of spectral leakage, signal loss, etc., and achieve the effect of increasing ground clutter and noise mitigation

Active Publication Date: 2009-12-03
COLORADO STATE UNIVERSITY
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  • Application Information

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Benefits of technology

[0007]Thus, various embodiments of the invention provide for the determination of environmental factors using a linear combination of radar da...

Problems solved by technology

The main disadvantage of such an approach is the signal loss, especially in cases where weather echoes have small radial velocities.
The limitation of spectral filtering techniques is the effect of...

Method used

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  • Dual-polarization radar processing system using time domain method
  • Dual-polarization radar processing system using time domain method
  • Dual-polarization radar processing system using time domain method

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Embodiment Construction

[0023]Some embodiments of the invention provide a system for determining environmental parameters within a region of interest using a dual polarization parametric time domain method. Previous work has provided parametric time domain methods (PTDM) that can estimate various parameters in single-polarization and / or dual-polarization radar data. Such methods and / or systems are described in U.S. patent application Ser. No. 11 / 83,0574, titled “Ground Clutter Mitigation Using a Parametric Time Domain Method,” filed Jul. 30, 2007, the entire disclosure of which is incorporated by reference for all purposes. PTDM provides a good model for clutter, precipitation and noise in the received radar data for each polarization. However, PTDM does not consider any correlation between the polarized data. Some embodiments of the invention provide a model and estimator to explore the correlation between the two polarization channels.

[0024]FIG. 2 shows an illustration of a conventional radar system 210 ...

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Abstract

Embodiments of the present invention provide for improved estimation of environmental parameters in a dual-polarization radar system. In some embodiments, environmental parameters can be estimated using a linear combination of data received in two orthogonal polarization states. In particular, embodiments of the invention improve ground clutter and noise mitigation in dual polarization radar systems. Moreover, embodiments of the invention also provide for systems to determine the differential reflectivity and/or the magnitude of the co-polar correlation coefficient and the differential phase in a dual polarization radar system.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]This application is a non-provisional of, and claims the benefit of, U.S. Provisional Patent Application Ser. No. 61 / 051,123, entitled “DUAL-POL SYSTEM,” filed May 7, 2008, the entire disclosure of which is incorporated herein by reference for all purposes.FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT[0002]This invention was made with Government support through the National Science Foundation, Grant No. ERC0313747.BACKGROUND[0003]One of the fundamental objectives of meteorological radar systems is to sample the atmosphere surrounding the Earth to provide a quantitative measure of precipitation. Conventional meteorological radars provide coverage over long ranges, often on the order of hundreds of kilometers. A general schematic of how such conventional radar systems function is provided in FIG. 1. In this illustration, a radar is disposed at the peak of a raised geographical feature such as a hill or mountain 104. The radar generates an e...

Claims

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Application Information

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IPC IPC(8): G01S13/95
CPCG01S13/951G01S7/292G01S7/025Y02A90/10
Inventor VENKATACHALAM, CHANDRASEKARANNGUYEN, CUONG M.MOISSEEV, DMITRI N.
Owner COLORADO STATE UNIVERSITY
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